Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments
Eocene and Oligocene radiolarians were recovered from Site 1128 on the slope of the upper continental rise during Ocean Drilling Program (ODP) Leg 182 in the Australian Bight. The early Oligocene radiolarians cored at Site 1128 vary considerably in abundance and preservation. Many intervals are barr...
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ftpangaea:oai:pangaea.de:doi:10.1594/PANGAEA.785795 2024-09-15T17:40:23+00:00 Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments Sanfilippo, Annika Fourtanier, Elisabeth LATITUDE: -34.391050 * LONGITUDE: 127.591030 * DATE/TIME START: 1998-11-05T15:15:00 * DATE/TIME END: 1998-11-07T03:30:00 2003 application/zip, 2 datasets https://doi.pangaea.de/10.1594/PANGAEA.785795 https://doi.org/10.1594/PANGAEA.785795 en eng PANGAEA https://doi.pangaea.de/10.1594/PANGAEA.785795 https://doi.org/10.1594/PANGAEA.785795 CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess Supplement to: Sanfilippo, Annika; Fourtanier, Elisabeth (2003): Oligocene radiolarians, diatoms, and ebridians from the Great Australian Bight (ODP Leg 182, Site 1128). In: Hine, AC; Feary, DA; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 182, 1-24, https://doi.org/10.2973/odp.proc.sr.182.004.2003 182-1128C DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg182 Ocean Drilling Program ODP dataset publication series 2003 ftpangaea https://doi.org/10.1594/PANGAEA.78579510.2973/odp.proc.sr.182.004.2003 2024-07-24T02:31:21Z Eocene and Oligocene radiolarians were recovered from Site 1128 on the slope of the upper continental rise during Ocean Drilling Program (ODP) Leg 182 in the Australian Bight. The early Oligocene radiolarians cored at Site 1128 vary considerably in abundance and preservation. Many intervals are barren or contain only rare fragments of radiolarians. Early Oligocene assemblages are dominated by sponge spicules and diatoms, similar to faunas of modern cold temperate shelf waters, and age diagnostic radiolarians useful for stratigraphic determination are rare. The interval is characterized by abundant actinommids and a dominance of robust artostrobiids representing the genus Siphocampe. In contrast, tropical taxa are present sporadically in rare abundance in the Eocene sediments. The radiolarian assemblages from the Eocene-Oligocene sequence at Site 1128 lack zonal marker species reported from regions further south or north, and thus, age estimates cannot be made using previously published zonations. However, the presence of diverse and well-preserved radiolarians in these assemblages indicates that it should be possible to establish a zonation for this intermediate latitude sub-Antarctic region as more comparable material becomes available. The ebridian Ammodochium ampulla Deflandre is present at Site 1128. A. ampulla was originally described from the upper Eocene diatomite of Oamaru, New Zealand, and was previously recorded in assemblages from the sub-Antarctic southwest Pacific, Deep Sea Drilling Project Sites 277, 281, and 283. Diatoms were either absent or rare and poorly preserved in the samples examined between Cores 182-1128C-9H and 21X. Zonal markers for both the low-latitude and the high southern latitude diatom zonations for the Oligocene are absent, and precise correlation of this interval is impossible. The diatom assemblage in Sample 182-1128C-8H-4, 130-132 cm, contains a combination of oceanic and neritic diatoms, and the presence of Rocella vigilans and Coscinodiscus rhombicus suggests a late ... Other/Unknown Material Antarc* Antarctic PANGAEA - Data Publisher for Earth & Environmental Science ENVELOPE(127.591030,127.591030,-34.391050,-34.391050) |
institution |
Open Polar |
collection |
PANGAEA - Data Publisher for Earth & Environmental Science |
op_collection_id |
ftpangaea |
language |
English |
topic |
182-1128C DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg182 Ocean Drilling Program ODP |
spellingShingle |
182-1128C DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg182 Ocean Drilling Program ODP Sanfilippo, Annika Fourtanier, Elisabeth Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
topic_facet |
182-1128C DRILL Drilling/drill rig Indian Ocean Joides Resolution Leg182 Ocean Drilling Program ODP |
description |
Eocene and Oligocene radiolarians were recovered from Site 1128 on the slope of the upper continental rise during Ocean Drilling Program (ODP) Leg 182 in the Australian Bight. The early Oligocene radiolarians cored at Site 1128 vary considerably in abundance and preservation. Many intervals are barren or contain only rare fragments of radiolarians. Early Oligocene assemblages are dominated by sponge spicules and diatoms, similar to faunas of modern cold temperate shelf waters, and age diagnostic radiolarians useful for stratigraphic determination are rare. The interval is characterized by abundant actinommids and a dominance of robust artostrobiids representing the genus Siphocampe. In contrast, tropical taxa are present sporadically in rare abundance in the Eocene sediments. The radiolarian assemblages from the Eocene-Oligocene sequence at Site 1128 lack zonal marker species reported from regions further south or north, and thus, age estimates cannot be made using previously published zonations. However, the presence of diverse and well-preserved radiolarians in these assemblages indicates that it should be possible to establish a zonation for this intermediate latitude sub-Antarctic region as more comparable material becomes available. The ebridian Ammodochium ampulla Deflandre is present at Site 1128. A. ampulla was originally described from the upper Eocene diatomite of Oamaru, New Zealand, and was previously recorded in assemblages from the sub-Antarctic southwest Pacific, Deep Sea Drilling Project Sites 277, 281, and 283. Diatoms were either absent or rare and poorly preserved in the samples examined between Cores 182-1128C-9H and 21X. Zonal markers for both the low-latitude and the high southern latitude diatom zonations for the Oligocene are absent, and precise correlation of this interval is impossible. The diatom assemblage in Sample 182-1128C-8H-4, 130-132 cm, contains a combination of oceanic and neritic diatoms, and the presence of Rocella vigilans and Coscinodiscus rhombicus suggests a late ... |
format |
Other/Unknown Material |
author |
Sanfilippo, Annika Fourtanier, Elisabeth |
author_facet |
Sanfilippo, Annika Fourtanier, Elisabeth |
author_sort |
Sanfilippo, Annika |
title |
Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
title_short |
Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
title_full |
Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
title_fullStr |
Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
title_full_unstemmed |
Radiolaria and diatom stratigraphy of ODP Hole 182-1128C sediments |
title_sort |
radiolaria and diatom stratigraphy of odp hole 182-1128c sediments |
publisher |
PANGAEA |
publishDate |
2003 |
url |
https://doi.pangaea.de/10.1594/PANGAEA.785795 https://doi.org/10.1594/PANGAEA.785795 |
op_coverage |
LATITUDE: -34.391050 * LONGITUDE: 127.591030 * DATE/TIME START: 1998-11-05T15:15:00 * DATE/TIME END: 1998-11-07T03:30:00 |
long_lat |
ENVELOPE(127.591030,127.591030,-34.391050,-34.391050) |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_source |
Supplement to: Sanfilippo, Annika; Fourtanier, Elisabeth (2003): Oligocene radiolarians, diatoms, and ebridians from the Great Australian Bight (ODP Leg 182, Site 1128). In: Hine, AC; Feary, DA; Malone, MJ (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 182, 1-24, https://doi.org/10.2973/odp.proc.sr.182.004.2003 |
op_relation |
https://doi.pangaea.de/10.1594/PANGAEA.785795 https://doi.org/10.1594/PANGAEA.785795 |
op_rights |
CC-BY-3.0: Creative Commons Attribution 3.0 Unported Access constraints: unrestricted info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1594/PANGAEA.78579510.2973/odp.proc.sr.182.004.2003 |
_version_ |
1810486406153240576 |